Surrey · England
Sand mastic for sash & case windows in Ash, Surrey
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Ash. Fully insured, ARBOMaster approved and guaranteed for a year.
- Weathered mastic on the most exposed windows
- Gaps where the frame meets the masonry
- Window mastic to renew ahead of painting
Sand mastic in Ash: local notes
With historic houses such as Wanborough Manor (about 2.7 miles east) nearby, there’s older building stock in the area around Ash as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Ash station, any sash windows need sound mastic to keep draughts and rain out. For an older house near a landmark such as Church of St Peter, the joint between an old wall and a newer frame is normally the first place rain gets in.
Ash is about 2 miles east of Aldershot, in Surrey. For sand mastic in and around Ash, please phone 0345 464 0079 or drop us an email for a quick quote. We cover Surrey from our Crawley base. Our area takes in 395 places across Surrey, from the larger towns to small villages. For nearby work, see our Reading page (18 miles or so).
Here we cover the GU12 and GU10 postcode area for sand mastic. That includes homes and businesses on Ash Church Road, Square Field Way and Littlefield Close. With the A331 and B3206 close by, Ash is simple for us to get to for sand mastic. We also cover the places around Ash: Ash Green (1 mile east), Tongham (1 mile south-west), Ash Vale (1 mile north), Seale (2 miles south) and Aldershot (2 miles west). We also work in nearby towns such as Guildford (6 miles east), Woking (8 miles north-east), Camberley (6 miles north), Farnham (4 miles south-west), Egham (15 miles north-east) and Frimley (5 miles north).
Landmarks near Ash
Around Ash, our work takes us to homes and buildings near Aldershot Park, The Connaught School and The Dover Arms. The nearest railway station is Ash station, about 0.5 miles north-east. Other landmarks nearby include Farnham Castle (4 miles south-west) and Ash Museum (within half a mile north-east). Not far away are Rowhill Nature Reserve and Hog's Back.
About our sand mastic in Ash
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant, and we will talk through which suits your home. If you have draughts and rain around sash boxes and gaps between timber frames and stone or brick, we can help, on period & listed homes, tenement windows and stone surrounds alike.
In smaller places like Ash, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. The right sealant depends on the frame and on what it sits in.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Ash (GU12, GU10)
- Wider area
- Surrey
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
At the end, we look at the finished work together. The work normally takes anything from a few hours to a full day, depending on how many windows, depending on the amount of work. In a smaller place like Ash, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Mention any tricky access
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
We quote each job on its own, so the first step is telling us about yours. Simply phone 0345 464 0079 or email us and describe the job.
Advice
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
What the job involves on each surface
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We work on single windows or whole elevations.
Timber door frames
Door frames get knocked and soaked and the mastic can crack early. It’s renewed by hand.
When something else is needed
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Sashes that rattle, stick or will not open
- Timber that has rotted
- Whether work needs listed building consent
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
Where we work in Ash
- Tenement windows
- Brick reveals
- Stone surrounds
- Sash and case windows
- Timber door frames
- Period & listed homes
Why act early in Ash
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall, so dealing with it now protects both. Homes in smaller places like Ash can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We will send you a clear quote for the lot.
Why book with us
- An ARBOMaster approved applicator
- Quality sealants from Arbo and Everbuild
- A 12-month guarantee on all work
- Rated 4.9 stars on Google
Read what affects the cost or what customers say.
What affects the cost of sand mastic
The quote reflects the job in front of us. We look at:
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
- Access and height
- Whether there’s mould to deal with
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Any access issues, like height or stairs
- A few pictures by email, if you can
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
Want a quote for sand mastic? Please call 0345 464 0079 or send us an email with a few details. We will explain what we’d do and give you a clear quote before work begins.
Also in Ash
Signs you need sand mastic in Ash
Previous repairs in cement or silicone often trap water or crack away. They don’t suit the joint, and they generally need raking out.
Any of these means the joints need attention:
- Weathered mastic on the most exposed windows
- A silicone bead on a sash window that spoils the look
- Cement or filler used on old window joints that has cracked
- Wind and rain getting in round a sash window
If you look after a building such as Walsh CofE Junior School, larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- What guarantee comes with the work
- Which colour the sealant will be
- What product goes in the joint
- What preparation is included
FAQs for Ash
Can you help a landlord with a rental near Ash station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or email us with the details for a clear quote.
Is Ash within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What is sand mastic?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Can I choose the sealant colour?
In most cases you can choose. We’ll explain which colours are available.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can old silicone round a sash window be swapped for sand mastic?
Usually, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
When will the new mastic be hard?
A skin forms quite soon, but full hardening takes longer. We will tell you what to expect for your job.
Should I use sand mastic or silicone?
Sand mastic normally suits period timber windows best. On modern frames, we’d normally use a flexible sealant.